Dataset Viewer
The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code: StreamingRowsError
Exception: CastError
Message: Couldn't cast
clip_id: string
seed: int64
fps: int64
n_frames: int64
pre_roll_frames: int64
shutter_frac: double
label_convention: struct<centre_px: string, bbox_px: string, streak_px: string, origin: string>
child 0, centre_px: string
child 1, bbox_px: string
child 2, streak_px: string
child 3, origin: string
world_frame: string
ball_radius_m: double
camera: string
delivery: struct<bowler: string, speed_kmh: double, spin_rpm: double, release_pos_m: list<item: double>, pitch (... 88 chars omitted)
child 0, bowler: string
child 1, speed_kmh: double
child 2, spin_rpm: double
child 3, release_pos_m: list<item: double>
child 0, item: double
child 4, pitching_point_m: list<item: double>
child 0, item: double
child 5, length_m: double
child 6, bounce_t_s: double
child 7, n_bounces: int64
frames: list<item: struct<ball_in_scene: bool, visible: bool, on_screen: bool, occluded: bool, world_m: list (... 206 chars omitted)
child 0, item: struct<ball_in_scene: bool, visible: bool, on_screen: bool, occluded: bool, world_m: list<item: doub (... 194 chars omitted)
child 0, ball_in_scene: bool
child 1, visible: bool
child 2, on_screen: bool
child 3, occluded: bool
child 4, world_m: list<item: double>
child 0, item: double
child 5, centre_px: list<item: double>
child 0, item: double
child 6, bbox_px: list<item: double>
child 0, item: double
child 7, radius_px: double
child 8, depth_m: d
...
child 9, streak_px: list<item: double>
child 0, item: double
child 10, t_s: double
child 11, frame: int64
child 12, streak_depth_m: list<item: double>
child 0, item: double
frames_dir: string
frame_pattern: string
cl_slope: double
derived: struct<elevation_rad: double, release_vel: list<item: double>, omega_rad_s: list<item: double>, boun (... 106 chars omitted)
child 0, elevation_rad: double
child 1, release_vel: list<item: double>
child 0, item: double
child 2, omega_rad_s: list<item: double>
child 0, item: double
child 3, bounce_t: double
child 4, bounce_x: double
child 5, bounce_y: double
child 6, flight_time: double
child 7, length_m: double
child 8, n_bounces: int64
cam_pos: list<item: double>
child 0, item: double
cs: double
sensor_mm: double
pitch_wear: double
target_bounce_y: double
sun_rot_deg: double
res_x: int64
spin_rpm: double
friction: double
spin_decay: double
cam_roll_deg: double
bowler: string
spin_axis: list<item: double>
child 0, item: double
cl_max: double
cam_look: list<item: double>
child 0, item: double
restitution: double
lens_mm: double
overcast: bool
sky_strength: double
exposure: double
sun_energy: double
cd: double
grass_shade: double
target_bounce_x: double
res_y: int64
speed_ms: double
post_roll_frames: int64
release_pos: list<item: double>
child 0, item: double
dust: double
clay_shade: double
shutter: double
sun_elev_deg: double
azimuth_rad: double
cam_shake: double
to
{'clip_id': Value('string'), 'seed': Value('int64'), 'bowler': Value('string'), 'release_pos': List(Value('float64')), 'speed_ms': Value('float64'), 'spin_rpm': Value('float64'), 'spin_axis': List(Value('float64')), 'azimuth_rad': Value('float64'), 'target_bounce_y': Value('float64'), 'target_bounce_x': Value('float64'), 'cd': Value('float64'), 'cl_max': Value('float64'), 'cl_slope': Value('float64'), 'cs': Value('float64'), 'restitution': Value('float64'), 'friction': Value('float64'), 'spin_decay': Value('float64'), 'camera': Value('string'), 'cam_pos': List(Value('float64')), 'cam_look': List(Value('float64')), 'lens_mm': Value('float64'), 'sensor_mm': Value('float64'), 'cam_roll_deg': Value('float64'), 'cam_shake': Value('float64'), 'fps': Value('int64'), 'shutter': Value('float64'), 'res_x': Value('int64'), 'res_y': Value('int64'), 'pre_roll_frames': Value('int64'), 'post_roll_frames': Value('int64'), 'overcast': Value('bool'), 'sun_elev_deg': Value('float64'), 'sun_rot_deg': Value('float64'), 'sun_energy': Value('float64'), 'sky_strength': Value('float64'), 'dust': Value('float64'), 'exposure': Value('float64'), 'pitch_wear': Value('float64'), 'grass_shade': Value('float64'), 'clay_shade': Value('float64'), 'derived': {'elevation_rad': Value('float64'), 'release_vel': List(Value('float64')), 'omega_rad_s': List(Value('float64')), 'bounce_t': Value('float64'), 'bounce_x': Value('float64'), 'bounce_y': Value('float64'), 'flight_time': Value('float64'), 'length_m': Value('float64'), 'n_bounces': Value('int64')}}
because column names don't match
Traceback: Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2840, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2373, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2398, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
self._cast_table(pa_table, json_field_paths=json_field_paths),
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
pa_table = table_cast(pa_table, self.info.features.arrow_schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
clip_id: string
seed: int64
fps: int64
n_frames: int64
pre_roll_frames: int64
shutter_frac: double
label_convention: struct<centre_px: string, bbox_px: string, streak_px: string, origin: string>
child 0, centre_px: string
child 1, bbox_px: string
child 2, streak_px: string
child 3, origin: string
world_frame: string
ball_radius_m: double
camera: string
delivery: struct<bowler: string, speed_kmh: double, spin_rpm: double, release_pos_m: list<item: double>, pitch (... 88 chars omitted)
child 0, bowler: string
child 1, speed_kmh: double
child 2, spin_rpm: double
child 3, release_pos_m: list<item: double>
child 0, item: double
child 4, pitching_point_m: list<item: double>
child 0, item: double
child 5, length_m: double
child 6, bounce_t_s: double
child 7, n_bounces: int64
frames: list<item: struct<ball_in_scene: bool, visible: bool, on_screen: bool, occluded: bool, world_m: list (... 206 chars omitted)
child 0, item: struct<ball_in_scene: bool, visible: bool, on_screen: bool, occluded: bool, world_m: list<item: doub (... 194 chars omitted)
child 0, ball_in_scene: bool
child 1, visible: bool
child 2, on_screen: bool
child 3, occluded: bool
child 4, world_m: list<item: double>
child 0, item: double
child 5, centre_px: list<item: double>
child 0, item: double
child 6, bbox_px: list<item: double>
child 0, item: double
child 7, radius_px: double
child 8, depth_m: d
...
child 9, streak_px: list<item: double>
child 0, item: double
child 10, t_s: double
child 11, frame: int64
child 12, streak_depth_m: list<item: double>
child 0, item: double
frames_dir: string
frame_pattern: string
cl_slope: double
derived: struct<elevation_rad: double, release_vel: list<item: double>, omega_rad_s: list<item: double>, boun (... 106 chars omitted)
child 0, elevation_rad: double
child 1, release_vel: list<item: double>
child 0, item: double
child 2, omega_rad_s: list<item: double>
child 0, item: double
child 3, bounce_t: double
child 4, bounce_x: double
child 5, bounce_y: double
child 6, flight_time: double
child 7, length_m: double
child 8, n_bounces: int64
cam_pos: list<item: double>
child 0, item: double
cs: double
sensor_mm: double
pitch_wear: double
target_bounce_y: double
sun_rot_deg: double
res_x: int64
spin_rpm: double
friction: double
spin_decay: double
cam_roll_deg: double
bowler: string
spin_axis: list<item: double>
child 0, item: double
cl_max: double
cam_look: list<item: double>
child 0, item: double
restitution: double
lens_mm: double
overcast: bool
sky_strength: double
exposure: double
sun_energy: double
cd: double
grass_shade: double
target_bounce_x: double
res_y: int64
speed_ms: double
post_roll_frames: int64
release_pos: list<item: double>
child 0, item: double
dust: double
clay_shade: double
shutter: double
sun_elev_deg: double
azimuth_rad: double
cam_shake: double
to
{'clip_id': Value('string'), 'seed': Value('int64'), 'bowler': Value('string'), 'release_pos': List(Value('float64')), 'speed_ms': Value('float64'), 'spin_rpm': Value('float64'), 'spin_axis': List(Value('float64')), 'azimuth_rad': Value('float64'), 'target_bounce_y': Value('float64'), 'target_bounce_x': Value('float64'), 'cd': Value('float64'), 'cl_max': Value('float64'), 'cl_slope': Value('float64'), 'cs': Value('float64'), 'restitution': Value('float64'), 'friction': Value('float64'), 'spin_decay': Value('float64'), 'camera': Value('string'), 'cam_pos': List(Value('float64')), 'cam_look': List(Value('float64')), 'lens_mm': Value('float64'), 'sensor_mm': Value('float64'), 'cam_roll_deg': Value('float64'), 'cam_shake': Value('float64'), 'fps': Value('int64'), 'shutter': Value('float64'), 'res_x': Value('int64'), 'res_y': Value('int64'), 'pre_roll_frames': Value('int64'), 'post_roll_frames': Value('int64'), 'overcast': Value('bool'), 'sun_elev_deg': Value('float64'), 'sun_rot_deg': Value('float64'), 'sun_energy': Value('float64'), 'sky_strength': Value('float64'), 'dust': Value('float64'), 'exposure': Value('float64'), 'pitch_wear': Value('float64'), 'grass_shade': Value('float64'), 'clay_shade': Value('float64'), 'derived': {'elevation_rad': Value('float64'), 'release_vel': List(Value('float64')), 'omega_rad_s': List(Value('float64')), 'bounce_t': Value('float64'), 'bounce_x': Value('float64'), 'bounce_y': Value('float64'), 'flight_time': Value('float64'), 'length_m': Value('float64'), 'n_bounces': Value('int64')}}
because column names don't matchNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
cricket-synth
Synthetic cricket delivery footage with exact ground-truth ball position, for
training a monocular ball tracker. Rendered in Blender (EEVEE) from a
physically simulated trajectory (drag, Magnus, seam swing, rigid-sphere
bounce with Coulomb friction), so spin genuinely turns the ball rather than a
fudge factor doing it. Source: https://github.com/Ranvin36/MAGNUS (Ball-Tracking/cricket-synth).
Single fixed camera angle: front-on, just behind the non-striker's (bowler's end) stumps, dead-centre on the pitch axis, looking straight down the strip — matching a real deployment rig.
Layout
manifests/<name>.jsonl one JSON line per clip: sampled delivery + scene params
out/clips/<clip_id>/f_%04d.jpg rendered frames for that clip
out/labels/<clip_id>.json per-frame ground truth for that clip
clip_id ties the three together (manifests/*.jsonl line's clip_id field
== out/clips/<clip_id>/ == out/labels/<clip_id>.json).
Label convention
| field | meaning |
|---|---|
centre_px |
ball centre at the shutter midpoint (= the frame timestamp) |
bbox_px |
[x,y,w,h] of the disc at the shutter midpoint. Does not cover the streak |
streak_px |
[u,v] at shutter open and at shutter close — build a streak box from this if you prefer |
streak_depth_m |
camera depth at shutter open / close |
visible |
in frame, in front of the camera, and not occluded (ray-cast tested) |
ball_in_scene |
false during pre-roll — genuinely ball-free frames, useful hard negatives |
world_m |
3D position; origin = pitch centre at ground, +Y = bowler's end, +Z up |
Pixel origin is top-left, +v downward. Intrinsics are pinhole with no
distortion; extrinsics_cv_frame1 is world→camera in OpenCV convention.
Labels are computed analytically by projecting the simulated position — never by inspecting rendered pixels — so they are exact by construction.
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